Typewriting machine



Oct. 26 1926. 1,604,174

7 A. G. F. KUROWSKI TYPEWRITING MACHINE Filed 001?- 2'7 1923 PatentedOct. 2%, 1926.

UNITED STATES httl hllt PATENT ALFRED G. F. KUROWSKI, F BROOKLYN NEWYORK, ASSIG-NOR T0 UNDERWOOD TYPE "WRITER COMPANY, OF NEW YQRK, N. Y.,A. CORPORATION' 0F DELAWAEIE.

TYPE-WRITING MACHINE.

Application filed October 27, 1923.

This invention relates to stencil cardholders for typewriting machines,and es pecially to a celluloid or other flexible baching sheet placed inthe cardholder frame.

An object of the invention is to provide improved means for fasteningthe backing sheet to prevent bulging and bending.

A further featureof the invention is the manner of connectinp the loweredge of the backing sheet to the bottom .of the cardholder frame, thesheet extending thence upwardly around the platen. This secures cleartype-impressions.

One or more tabs of novel design on the backing sheet engage slots inthe bottom of the card-holder frame. On the frame holes are providedthrough which a pencil point may be inserted, to guide the tabs into theslots when assembling the backing.

Another novel feature is the permanent shaping of the celluloid backingsheet so that it will fit the contour of the platen at the printingline, in every position of the cardholder, thereby providing asatisfactorysupporting surface for the stencil card, so that clear-cutimpressions are produced.

The principal object of this invention is to provide interlockingportions of the cardholder and the backing sheet or card that by the actof inserting the card into the holder will cause such portions to engageand lock the card in position for writing; and which means, furthermore,may be integral with the card and with the bottom support on the holderfort-he card, respectively.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a view, in front elevation, of a portion of card-holderframe with the hacking sheet shown attached thereto,and the stencil-cardpositionedthereon.

Figure 2 is top plan View, partly in section, of a card-holder frame,showing slots for attaching the "backing sheet.

Figure 3 is a fragmentary bottom View of the device shown in Figure 2.

Figure 4 is an end elevation ofthe backing: sheet, showing its permanentshaping. Figure 5 is anendelevation of a portion of a typewriter, partlyin section, with the intention attached thereto.

In the accompanyingdrawings a revoluhle platen carries a card-holderil,and types 12 strike against the front of the Serial No. 671,066.

platen. Card-holder 11 may be suspended from behind, over the platen 10,on a linespacing mechanism, a portion of which is shown at 13. 1hcomplete cardholder mechanism is fully disclosed in my co-pending;application No. 666,907, filed October-b, 1923. Card-holder 11 comprisesupstanding frame members 1 1 and a lower cross-bar 15 in the form of atrough having a front, upstanding, flaring side 16, a bottom 1'? and arear, flaring side 18. it. stencil-card 19 comprising; a rectangularcardboard frame 20, to the rear of which is pasted a stencil-sheet 21,may he placed with its lower edge in the trough of cross-bar 15, withits side margins within the card-holder sides 1 1 to position thestencil-sheet 21 to receive type-impressions, as shown in Figures 1 and5. A backingsheet or backing piece 22, which may be made of celluloid,or other material having suitable properties, is fastened close to theback edge of the bottom 17 of the crossreach 15, and forms a pocket inwhich the stencil-card 19 is easily insertihle. Backing sheet 22 alsosupports the stencil-card :19 to prevent bulging); and bending thereofduring the typing operation,so that clear-cut typeimpressions may beproduced.

The bulging and bonding; of the stencilcard 19 is further avoided duringthe typing operation by fastening the backing; sheet 22 at its loweredge only to the back edge of the bottom 17. This allows the backingsheet 22 to be free to extend upwardly, around the platen 10 at theprinting; line, in each position of the card-holder. The sheet22 may begiven apermanently curved shape, as shown in Figure 4, so that it willbetter fit the contour of the platen 10 at the printing; line, andthereby always present a satisfactory supporting; surface against whichthe types 12 can strike. For attaching the sheet 22 to the card-holder11, a shaped-tab 253 may preferably be provided at each end of the lowerer go of sheet 22. Radiallyshaped slots 2a in the trough in bottom 1'?are provided and spaced to receive tabs 23. Each tab 23 is formed of alip portion. 25 and a projection When tabs 23 are first introduced intoslots 2%, they are compelled to curve slightly, due to the radial shapeof slots 2 1, see Figure 2, until the lower edge of the backing sheet 22reaches the bottom 17, at which time the projection 26 will straightenout and will as curved.

permanently hold the sheet 22 in place. The sheet 22 can be removed bytearing tabs 23 out of the card-holder 11. The lips 25 haveblunt-pointed leading edges to guide the tabs 23 into the slots 24.

To facilitate the insertion of tabs-23 in slots 24, holes 27 areprovided in line with the slots 24 on the front, upstanding, flangedside 16, through which a lead-pencil point may be inserted to push backthe tabs 23, so as to bring them in alignment with the slots24. Theleading edges of lips 25 will then readi y enter and guide tabs 23 intoslots 24. In order to prevent the tabs 23 from interfering. or beinginterfered with, by any part of the carriage, angle projecting pieces 28mounted on the downwardly facing side of the bottom 17 and extendingaround slots 24 be provided to guard the tabs 23, see Figures 1 and 5.

It will be understood that the bottom plate 17 of the holder has a slotat 24, with an extension 4 that projects laterally, being shown It willbe further understood that the tab 25 projecting with the lower edge atone or more places has an extension 26 deflected laterally, or to theleft; and the lowerwall 6 of the tab extends downwardly away from thefree end of the portion 25 to the middle portion; while the otherportion of the tab may have the lower edge 7 extending upwardly from themiddle portion. This forms asomewhat angular low-er edge that willassist in directing the tab to the slot 24.

When the card is moved downwardly and enters the slot 24 at the mainportion, the inclined edge 26 of the tab will engage the deflectedportion 4 of the slot, that will have a kind of double cam actionserving to deflect the tab free extension in the direction of thedeflected slot and the engagement will beprogressive from the loweredgeof the extension to the free end, and from the connection of thedeflected slot-portion to its other end. When the tab penetrates theslot, it will. pass beneath the wall 17 and will naturally tend toflatten at the bent free projection, which will bring it beneath themargin of the slot-extension and prevent withdrawal of the tab. It willbe further understood that this locking means comprises simply anintegral portion of the card, that co-operates with an integral portionof the bottom plate 17, being merely a slot therein.

Variations may be resorted to within the scope oft-he invention, andportions of the improvements may be used without others.

Having thus described my invention, 1 claim:

1'. The combination, in a typewriting machine having a revoluble platen,of a stencilcard-holding frame arranged to reciprocate in front of theplaten, said frame having side arms connected by a bottom cross-piece,and

means for positively securing a formed backin -sheet to said crossaiecesaid backin b 7 23 sheet serving as a rear support for the stencil-card,which backing-sheet together with the card-holding frame forms a curvedpocket for the card.

2. The combination, in a typewriting machine ha\ ing a revoluble platen,of a stencilcard-holding frame arranged to reciprocate in front of theplaten, said frame having side arms connected by a bottom cross-piece,and means for positively securing a formed backing-sheet to saidcross-piece, including hooks projecting downwardly from the bottom edgeof said backing-sheet, said hooks being designed to hold thebacking-sheet in its effective position by engaging locking slots in thecard-holding frame, said backing-sheet serving as a rear support for thesteneilcard, the backing-sheet together with the card-holding frameforming acurved pocket for the card.

3. In a typewriting machine, a platen, a card-holder mounted adjacent tothe platen, interlocking means for fastening a backing sheet by itslower edge to the card-holder, said means comprising a tab at the loweredge of said sheet, and a slot for engaging the tab in the lowercross-reach of the cardholder. 7

4. The combination, in a typewriting machine having a revoluble platen,of a stencilcard-holding frame arranged to reciprocate tangentially infront of said platen, said card-holding frame having side-supportingarms and a bottom cross-bar forming an integral part of said supportingarms, said cross-bar having locking slots designed to engage with hooksprojecting from the bottom edge of a celluloid backing-card in a mannerto effectively hold the card in its operating position, said cross-barhaving also holes adjacent said locking slots, through which holes apointed tool may be inserted to guide the hooks into engagement with theslots in the eard-holding frame.

5. In a typewriting machine, a platen, a card-holder mounted adjacent tothe platen, and interlocking means for fastening a backing sheet by itslower edge to the cardholder, said means comprising tabs extend ing fromthe lower edge of said sheet, and slots for engaging the tabs in thelower cross-reach of the card-holder, said lower cross-reach havingholes adjacent said tabs, through which holes a pointed tool may beinserted to force said tabs into engagement with the slots in thecross-reach.

6. In a typewriting machine, a platen, a cardholder mounted adjacent tothe platen, interlocking means for fastening a backing sheet by itslower edge to the card-holder, said means comprising a blunt-pointed tabextending from the lower edge of said sheet, aslot in the bottom of thecard-holder, and

a hole in the front upstanding side of the cross-reach of the cardholderthrough which the tab may be directed to enter the slot, said tab havinga projection formed there on, which, on being, inserted in the slot,locks the backing sheet to the cardholder.

7. In a typewriting machine, a platen, a card-holder mounted adjacent tothe platen, interlocking means for fastening a backing sheet by itslower edge to the card-holder, said means comprising a tab extendingfrom the lower edge of said sheet, and a slot for engaging the tab inthe lower cross-reach of the cardholder, and means to guard the tabagainst injury.

8. In a typewriting machine, a platen, a card-holder mounted adjacent tothe platen, interlocking means for fastening a backing sheet by itslower edge to the card-holder, said means comprising a tab extendingfrom the lower edge of said sheet, and a slot in the bottom of thecard-holder, a hole in the front upstanding side of the cross-reach ofthe card-holder through which the tab may be directed to enter the slotsaid tab having a projection formed thereon, which, on being inserted inthe slot, locks the backing sheet to the card-holder, and a guard on thebottom side of said bottom of the card-holder around the slot to protectthe tab from interference.

9. The combination, in a typewriting machine, of a revoluble platen, anda worksupporting membe mounted adjacent to the platen, said memberhaving a permanently curved shape for supporting a work-piece contactingwith the platen at the printing line to enable clear-cuttype-impressions to be made on the work-piece, said supporting memberco-operating with a celluloid sheet attached thereto to hold thework-piece therebetween.

10. In a typewriting machine. a revoluble platen, a card-holder mountedadjacent to the platen, and a flexible backing sheet, having apermanently curved shape, for supporting a work-piece tangent to theplaten at the printing line to enable clear-cut typeimpressions to bemade on the work-piece in any position of the card-holder.

11. In a typewriting machine, a revoluble platen, a card-holder mountedadjacent to the platen, a backing sheet for said holder, and fasteningmeans betweenthe lower portion of said sheet and the card-holder whichall()\ s the upper portion of the sheet to rest against the platen atthe printing line in any position of the card-holder, said sheet havinga permanently curved shape for supporting a work-piece tangent to theplaten at the printing line to enable clear-cut type-impressions to bemade thereon in any position of the card-holder.

12. The combination, in a typewriting machine, of a revoluble platen, acard-holder mounted adjacent to the platen, a backingsheet for saidholder, and means for fasteningsaid sheet to the card-holder in a mannerto present the sheet to the platen at the printing line, said sheetbeing permanently curved to contact with the platen in' a man nor toenable clear-cut type-impressions to be made on the sheet in anyposition of the cardholder.

13. A card-holder having at the bottom a longitudinally slotted wallwith a deflected extension, and a card with a tab at the lower parthaving a portion projecting longitudinally with its lower edge inclineddownwardly away from the free end, whereby the tab as moved downwardwill engage progressively at said inclined edge-portion along the wallof said slot-extension to bend said tabprojection laterally, until thetab penetrates the slot and thereupon flattens to normal position, toproject beneath the slotted wallmargin and prevent withdrawal from theslot.

let. A card-holder having at the bottom a longitudinally slotted wallwith a deflected extension, and a card with a tab at the lower parthaving a portion projecting longitudinally with its lower edge inclineddownwardly away from the free end, and thence inclined upwardly to theother end of the tab, whereby the tab as moved downward will engageprogressively at said inclined edge-portion along the wall of saidslot-ex tension to bend said tab-projection laterally until the tabpenetrates the slot and thereupon flattens to normal position, toproject beneath the slotted wall-margin and prevent withdrawal from theslot.

15. A card-holder having locking slots, and a card having a locking hookforming an integral part thereof, said hooks being arranged to latch thecard in its normal position when the same is lowered into the holder.

ALFRED G. F. KUROWVSKI.

